Hairdresser shops in Shanghai do it, so toilet signs can do it, too.
For me this is a highly creative approach to langugage. "We wrote from right to left for thousands of years, so why can't we do the same with those simple Latin letters".
By the way, this is the oldest Chinglish photograph in my collection.
Taken on the southern island of Hainan 海南 in 1981 (!). Thanks very much, Bernd.